Ventilating fan



Feb. 24, 1931. w, J, McCAlG 1,793,814

YENTILATING FAN Original Fil? Aug. r1'7, 1928 2 Sheets-Sheet l Feb. 24, 1931. W, J; MCCAIG 1,793,814

VENT ILAT I NG FAN Original Filed Aug. 17, 1928 2 Sheets-Sheet 2 .Z0 Il |I :i 'Zvz van ar:

fg i my f u Patented Feb, 24, 1931 UNITED STATESy PATENT OFFICE WILLIAM J. Necaxa, onBUirFaLo, Naw Yoan, assIaNoa To 'man nnrUBLrc METAL- waaE COMPANY, or BUFFALO, NNW Yonx, A conroaa'rIoN or NEW Yonx vnN'rILA'riNe raN Application led August 17, 1928, Serial 1111.300371. Renewed July 11, 1930.

VL; Its chief object is the provision of a reversible deflector for eifectually controlling the radial discharge of air from the fan and directing it in a predetermined path'orelevation desired by the user.

Another object of the invention is to pro- -vide a defiector of this character which is simple and inexpensive in construction, and which is readily adjustable by the user to meet his requirements.

In the accompanying drawings Figure 1 is a side elevation of a fan showing mydeflector thereon in one position. Figure 2 is an enlarged fragmentary vertical section thereof taken in the plane of'lne 2--2, Figure l. Figure 3 is a similar view showing the deflector in adifferent position. Figure 4 is a top plan View of the fan.

Similar characters of reference indicate corresponding parts throughout .the several views.

By way ofexalnple, my improved dellector has been shown in connection with a desk type of Ventilating fan comprising a base 10, an electric motor 11 supported in a vertical position on the base and including a shaft 12 projecting upwardly therefrom, and a fan wheel including an inverted -cone-shaped member or deflector 13 preferably of hollow form xed on the motor-shaft to turn therewith and fanv blades 14 radiating outwardly and downwardly from the flaring upper portion of said cone-shaped member and secured at their lower ends to a ring 15 surrounding the lower portion of the latter. When the fan is rotated, the air will. be thrust outwardly andupwardly by the centrifugal action created by the blades 14 in a direction controlled by the conical member 13 and the resulting suction produced at the center of the whirl-.

ing column of air will draw the air inward to replace the displaced air.

Surrounding the fan-blades is a cage or guard consisting of upper and lower rings 16, 17 and radially-disposed tie rods 18 extending around the bottom and sides of the fan wheel and joined at their upper and lowei` ends to said rings in the manner shown in Figures 1 and 2. The lower ring may be attached to a collar 19 fixed to the upper end of the motor while the upper ring is support-l ed by the tie rods and is disposed a suitable distance above the conical member 13.

Supported on the upper guard rin rectly over the top or Haring end of te conical member of the fan is a reversible supplementary deflector 20 which is designed to direct and spread the air circulated by the fanblades outwardly in a more or less horizontal plane so that a gentle blast of air is brought at predetermined elevations to suit the desires of the user. In the preferred construction of the deflector shown in the drawings, the same comprises a hollow body 21 of frusto-conical form having convex top and bottom walls 22 and being of a diameter to extend beyond the periphery of the upper end of the conoidal member 13, so that its annular marginal portions 23, 24 are disposed in the path of travel of the air distributed by centrifugal force created by the blades 14 assisted by such conoidal member and serve to deflect the air in a greater or wider path and in a lower zone approximatin the horizontal. In the inverted position o the deector shown in Figure 2, wherein its larger, horizontal detlecting surface or margin 23 is face downward, the air from the fan is deflected outwardly in a horizontal path with the blast of air circulated thereby striking the head of the user, if he be sitting, for example, at his desk While creating a desired circulation of the air at that elevation, it does not disturb the papers or other articles on the desk of the user. In the position of the deflector shown in Figure 3, wherein its upwardly-flaring portion 24 is disposed face downward, the air is deflected outwardly and slightly upwardly in a more or less contracted zone, as compared with that of its other position, with the blast of air circulating. just above the head of the user or thereabouts.

The deiiector 20 is detachably mounted on the upper guard-ring 16 by means of a plurality of radial attaching lugs 25 having out wardly-facing notches 26 therein for engagement with substantially upright bolts 27 Welded or otherwise fastened to said guard ring. Arranged over the defiector is a guard frame 28 which likewise carries radial attaching lugs 29 for engagement with the bolts 27 whose nuts 30 serve to hold both the deflecto and to guard firmly in place.

Whi e this improved deflector is manifestly simple in construction, it effectively renders the fan readily adjustable as to the desired direction of the air blast created by it to meet l the conditions requiredl of the user.

I claim as my invention 1. A Ventilating fran, comprising a fan Wheel including a revolving defleeor and blades carried thereby for diffusing the air outwardly and upwardly, and a supplementary deiector surmounting said fan wheelI and adapted t0 be detachably supported in different positions over said revolving defiector for directing the air at varying elevations and in a compara'lively wide zone..

2. A ventilating fan,y comprising a fan wheel including a revolving deflector and blades carried thereby for diffusing the air outwardly and upwardly, and a reversible supplementary deiiector surmounting said fanv wheel and having deiecting surfaces on its opposite sides for .directing the air laterally at varying elevations.

3. A Ventilating fan, comprising a fan Wheel including a revolving deflector and blades carried thereby for diffusing the airl outwardly and upwardly, and a reversible supplementary deflector surmounting said fan wheel and having marginal deflecting surfaces on its opposite sides for directing the air laterally in predetermined paths and at Varying elevations, said surfaces extending beyond the periphery of the fan wheel deiector.

4. A Ventilating fan, comprising a fan wheel including a revolving deflector and blades carried thereby for diffusing the air outwardly and upwardly, and a `reversible supplementary deflector surmounting said fan wheel and including a body portion and annular marginal deiiecting surfaces at its opposite sides for directing the air laterally in predetermined paths, one of said surfaces being horizontal and the other being inclined zontal plane and the other being inclined upwardly and outwardy.

6. Ventilating an, comprising a fan wheel including a revolving deflector and blades carried thereby for diffusing the air outwardl and upwardly, a guard frame for said an' wheel, and a reversible supplementary deflector supported on said guard frame above the fan wheel and having deflecting surfaces on its opposite sides for directing the air laterally v1n predetermined paths.

. A Ventilating fan, comprising a fan wheel including a revolving defiector andblades carried thereby for diffusing the air outwardly and upwardly, a guard frame for said fan wheel including a ring disposed above said deflector and having fastening elements rising therefrom, a supplementary deflector surmounting the fan wheel and adjustably suspended from said guard-ring, said supplementary deectorhavlng deiecting surfaces for directing the air laterally at varying elevations, and radial attaching lugs extending from theperiphery of said supplementary deflector and 'engaging said fastening elements.

8. A deflector for Ventilating fans, comprising a substantially frusto-conical body aving convex top and bottom walls, said body extending beyond the peripheries of said convex walls to provide upper and lower annular, marginal deflecting surfaces for directing the air laterally at different elevations in the normal and reversed positions of the deiiector, respectively.

WILLIAM J. MCCAIG. 

